* Weight is a force: Weight is the force of gravity acting on an object's mass. It's always directed downwards towards the center of the Earth.

* Forces have equal and opposite reactions: Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. So, if an object has weight (due to gravity pulling it down), it exerts an equal and opposite force upwards on whatever is supporting it.

Examples:

* A book on a table: The book's weight pushes down on the table. The table, in turn, pushes upwards on the book with an equal and opposite force.

* A person standing on the ground: The person's weight pushes down on the ground. The ground pushes upwards on the person with an equal and opposite force.

Key takeaway: Weight is a force that acts downwards. It doesn't create an outward force. Instead, it leads to a reaction force acting upwards.